Question

Wykonaj działania
a) 0,2 * (-3 1/4+1/4) =
b) 2,6 : 0,1-0,1:1/60=
c)1/5-1/6:(2-1,8)=
d)2,25*3 1/5-1,3=
e)1 1/3-2:(1-2/3)=
f) 0,3-1,2:(9/4*(0,2-3/4)=

Dam naj

Answer 1

A).0,2 · (-3 i 1/4 +1/4) = 1/5 ·· (-3) = -3/5
b).2,6 : 0,1 - 0,1 : 1/60 = 26 - 1/10 · 60 = 26 -6 = 20
c).1/5 - 1/6 : (2-1,8) = 1/5 - 1/6 : 0,2 = 1/5 - 1/6 : 1/5 = 1/5 - 1/6 · 5 =
= 1/5 - 5/6 = 6/30 - 25/30 = -19/30
d).2,25 · 3 i 1/5 - 1,3 = 2 i 1/4 · 3 i 1/5 - 1 i 3/10 = 9/4 · 16/5 - 1 i 3/10 =
= 36/5 - 1 i 3/10 = 7 i 1/5 - 1 i 3/10 = 7 i 2/10 - 1 i 3/10 = 6 i 12/10 - 1 i 3/10 =
= 5 i 9/10
e).1 i 1/3 - 2 : (1 - 2/3) = 1 i 1/3 - 2 : (3/3 - 2/3) = 1 i 1/3 - 2 : 1/3 =
= 1 i 1/3 - 2 ··3 = 1 i 1/3 - 6 = 1 i 1/3 - 5 i 3/3 = - 4 i 2/3
f).0,3 - 1,2 : (9/4 · (0,2 - 3/4)) = 0,3 - 1,2 : (9/4 · (1/5 - 3/4)) =
= 0,3 - 1 i 2/10 : (9/4 · (4/20 - 15/20)) = 0,3 - 1 i 1/5 : (9/4 · (-11/20)) =
= 0,3 - 6/5 : (-99/80) = 0,3 - 6/5 · (-80/99) = 3/10 +32/33 =
= 99/330 +320/330 = 419/330 = 1 i 89/330